Vehicle-wheel and pneumatic tire for same.



No. 853,228. PATENTED MAY 14, 1907.

R. DALMER.

I VEHICLE WHEEL AND PNEUMATIC TIRBIFORSAME. APPLICATION FILED D 30. 27, 1905.

.2 sun's-sum 1.

PATENTED MAY 14, 1907.

R.-DALMER. VEHICLE WHEEL AND PNEUMATIC TIRE FOR SAME.

ABP LIOATION FILED DEC. 27,1905;

'2 SHEETS-SHEET 2."

in Pneumatic Tires for Same,-of which ROBERT PALMER, OFQLONDON, ENGLAND.

VEHICLE-WHEEL AND-PNEUMATIC TIRE Fon- SAME.

Specification of Letters Patent.

latented May s, 1907-.

' Application filed December 27, I9Q6. Serial No. 293,495.

To all whom it may concern;

Be it known that I, ROBERT DALMER, a

subject of the Emperor of Austria, residing' at London, England, have invented'new and useful Improvements in Vehicle-Wheels and the following is a specification.

This invention has for its object the con- I struction of a pneumatic tired wheel for use on motor cars, bicycles or other vehicles, in such a Way as to-make it practically impossible for the inflated inner tube to become punctured or injured in any way. If how' ever through some. unforeseen cause the inner tube should become unfit for use, I provide a simple automatic device to "enable the car to proceed on its journey onthe solid outer tire without the necessity ,of

a having to eifect troublesome tire repairs on the road. This outer tire is further constructed in such away, that the danger of side slipis reduced to 'a minimum. In order that this inventionmay be readily understood, I will now proceed to describe a convenient design 0 tire, without of course limiting the invention to details of construction which would admit of reasonable modification within the scope of the invention.

Figure 1 is across section of a motor wheel and pneumatic tire. Fig. 2 is a partseetiona side'view of the same; 3

In the felly f of,a motor or other wheel,

I fix by means of screws and nuts or other well known means a metal box m, preferably made of steel so that it rests firmly on all points against "the rim of the wheel. I In the opposite face of the box or case, Iprovide a circumferential gap or slot of a suit.

able width and depth, while the interior of the box'or case is constructed insuch a way,

that a clear passage of a suitable form is left, presenting in cross section an ellipse, a

circle or other suitable shape, with one seg ment cut out, formed by th'egap'or slot above described. In this passage, I put my inner inflated rubber tube, thus protecting it from suitable cross'section, and being fixed; paralall injury. On eachside ofthe circumferential slot'or "gap, Ifix by means of beads 'or studs screwed into the metal box at suitable intervals, or bypther equivalent means, two-rubber stripsr ofa semicircular or other lel to e'a'li other. The inflated inner tube 0 contained in the passage of the metal-box aboye described is constructedlike a length scaled up airtight by means of flexible caps instead of the ordinary endless circular tube as nowused. In order to protect this rub to strengthen it, I incaseitin leather, canvas or other suitable substance, which may be preparation, so as tolessen friction and to make it impervious to water. The outer tire which comes into contact with the wood or rubber, or other suitable material. 1

' holder inone piece, the said holder meeting the neck at right angles, while I provide at the inner ends of the neck, strips projecting at a suitable angleto which the flangesa can be vwelded, or screwed, or fixed by some other struct in steel, or 'other metaL-wood or ruleber. If metal or wood is used, the treadis fixed in the holder h by. a. suitable number of screws, or I may use bolts, fitting into holes in the hoIder andv enetrating the width of the tread, each bolt eing provided at one end with a flat headjor other stop, and at the other end with a screw and nut which I may secure with a, in, or other weil known method. 'iInlord'er to prevent the danger of side slip, I may corrugatethe tread, invcase I use metal, and if wood isused, vertical. strips in the tread-.1 If solid rubber is'used, I provide the holder with'flan'ges or ribs of well known design, in order to grip and hold in. position the pieces of rubber. The flanges (a areof such a construction that they adjust themselves to-the inner wall of the metal box mabove described. 1 I construct theseii anges preferably'of spring steel, so that they their original shapewhen they are released after being pressed together, I may further use thin layers of spring steel, so as to form a laminated spring of well known design in constructing these flanges. In the metal box m I p'i ovide a door D of sufficient width, so as to allow of the easyremo'val oi the ber tube against dirtand grit, and also so as impregnated with graphite or other suitable road, I construct of steel or other-metal,

In-order not t impair the resilience of the well'known'method. The tread't, I t a e,

ofhose of suitable diameter with both ends of steel can be hammered .or otherwise fixed.

\tions=of'the-outer tire and of the inner rotten This door can be securely bolteddown when the wheel is in use.

The-sections of theoirt'er tire' are held together by means of a flexible-steel band s' I'O threaded through their hollow necks. This steel band is fixed to the metal plate 2 above described by means of a spiral spring '3. I provide this steel band, so as to prevent dirt and grit working through the cracks ber 5 tween the sections of the outer tire; a further.

function of'this' steel band and spring will be hereinafter explained.

I have now described the difierent elements of my tire and will proceed to explain the action when the inner tube is inflated, and secondly when the inner tube is not in use. The

neck of the sections composing the outer tire fits l'oosely into the circumferential slot or gap abovedescribed, and is long enou h to allow ofa suflicient movement up and wn, while the flanges a are of such a shapethat they adjust themselves readily to the inner wall of the metal box. It will be seen that by inflating the inner tube, thesegflanges will the metal. box, thus securely fixing the sections, composing the outer tire, in position, while still admitting of the up and down movement caused. bythe unevenness of the road. The resilience of the inflated inner tube is thus instantly transmitted tothe sections forming the outer tire. The two rubber stri s 1' fixed on each side of the circumferentia slot or gap are 'rovided' to absorb all vs eci'ally hard knocs or bumps, the whee may receive, which knocks are further lessened by the wings of the flanges becoming compressed and acting as a spring. This point is of special importance when great .weightshave to be supported.

1 now proceed to desciibe the action of my tire when the inner tube is not operative. 3 The sections of the outer tire t joined to- 'gether by thesteel band .9 which is fixed by means of a s ring to a hook or similar contrivance out e metal plate closing the passage of the metal box as above described. The inflated inner tube being thrown out of action, this spring becomes now operative, pullingthe sections composing the outer tire inwar until the tread holder of the outer tire rests on the rubber strips 1-; the flanges a mustbe so constructed that their ends then reach'the widest diameter of the passage of the metal box, so that any further movement would compress the wings of the flanges metal box secured to the folly thereof, said engaging with the arc shaped sidewalls of. be tightly pressed against'the' innerwal-l of.

which are constructed as a spring asabove described. The tire derives now its resilionce. from thesprings forming the flanges a and the rubber strips fixed on each side of the circumferential slot or gap.

Having now described my said invention, I declare that what I claim and desire to secure by Letters Patent/is:

1. Thelcombination with a wheel, of a box having a cifbumferential slot and its interior side walls being of arc shape, a tire, consisting'of a tread portion and a vertical portion extending into. the circuipferential slot and outward y and downwar y curved flanges made of springy metal connected to said vertical (portion and enga mfg with the are shaped si es of the box said flanges forming a semicircle. I

2.-- The combination with a wheel, of a' metal box secured to thefelly thereof, said box having a circumferential ,slot and its interior side walls being of arc shape, an outer .tire made-up of SGCtlOIlS', each section 'con- 85 sisting of a tread portion, and a vertical'hol;

low portion extending into the circumferential slot, and outwardly and downwardly curved metal flanges on said vertical portion the box and the pneumatic tire in said box said flanges forming a semicir'cle..

- 3. The combination with a wheel, of a metal box secured to thefelly thereof, said box having a circumferential slot, an outer tire composed of sections, each section com-- prising a tread portion anda hollow vertical portion extending into the box, a pneumatic tire in the box, a steel band passing through the hollow vertical portions and a spring .con-' 1 oc necting said band to a part of the box.

I 4. The combination with a wheel, of a. metal box secured to the felly thereof said box having a circumferential slot and its in-- terior side walls being of .arc shape an outer r05 tire composed of sections, each'section comprising a tread'portion and. a hollow vertical .portion extending into the circumferential slot and flown-ward'ly and outwardly curved flanges connectedto said vertical portion and i re engaging with the are shaped sides of the box, a pneumatic tire in the box, and a steel band passing through the hollow vertical portions. p I

In testimony whereof I have signed my 11 5 'name to "this specification in,the presence of two subscribing witnesses.

ROBERT DALMER.

Witnesses: y ERIoHARD A. HoFrMAivN, CHARLES CARTER. 

